Mixer



FIG. 1 is a perspective view showing the new design;

FIG. 2 is a perspective view thereof;

FIG. 3 is a perspective view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a side view thereof; and,

FIG. 7 is a side view thereof.

CLAIM The ornamental design for a mixer, as shown and described. 